/**
 * OAuth2 Authentication Middleware
 */
import { Request, Response, NextFunction } from "express";
import type { TokenInfo } from "./types.js";
export interface AuthenticatedRequest extends Request {
    tokenInfo: TokenInfo;
}
/**
 * Bearer Token Authentication Middleware
 *
 * Validates the Authorization header and attaches tokenInfo to the request.
 */
export declare function requireAuth(req: Request, res: Response, next: NextFunction): void;
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